<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>在乘法运算时，JavaScript 会尝试把字符串转换为数字</title>
</head>

<body>
    <h1>JavaScript 数字</h1>

    <p>在相乘时，JavaScript 会尝试把字符串转换为数字：</p>

    <p id="demo"></p>
    <script>
        var x = "100";
        var y = "10";
        var z = x * y;
        document.getElementById("demo").innerHTML = z ;
    </script>
</body>

</html>